How long can the AquaControllers serial cable be?
The maximum length serial cable is about 100 foot. You can buy a shielded serial extension cable at your local computer store. It should be a straight-thru cable with a male DB9 connector on one end and a female DB9 connector on the other, so that it can be directly connected to your PC and the AquaController serial cable we sell (part #SERPC9). NULL-modem cables will not work as an extension cable as their internal connections are incorrect. If you wish to build you own extension cable pins 2, 3, 4, and 5 should be connected straight-thru on each of the DB9 connectors. Be sure to use shielded cable especially for longer cable runs.
